内蒙古农牧交错带土地利用方式对土壤CH4吸收的影响

本文选取内蒙古锡林郭勒盟太仆寺旗温带半干旱典型草原及其邻近不同开垦年限的农田（5年，10年，50年）为研究对象，利用静态暗箱法对土壤CH4的吸收通量进行了野外观测试验。结果表明：天然草地转化为农田后，土壤吸收CH4的能力增强，随农垦年限的增加，土壤对CH4的吸收能力呈现逐渐降低趋势，依次为F5〉FIO〉F50〉G。

The effect of land use on CH4 absorption in agro - pastoral ecotone of Inner Mongolia

We, using the dark enclosed chamber technique during April - October , observed methane flux from temperate semi - arid grassland and adjacent croplands in Taipusi, Xilingol League, Inner Mongolia. These croplands are of different reclamation histories, from 5 years to 10 and 50 years. The experiments demonstrated that methane absorption capacity of soil increased after grassland turned into cropland ; but this capacity tended to decline after reclamation, that is, F5 〉 F10 〉 F50〉 G.